<template>
  <div class="app">
    <h3>我是App组件(祖),{{ name }}--{{ price }}</h3>
    <Child></Child>
  </div>
</template>

<script>
import Child from "./components/Child.vue";
import { reactive, toRefs } from "@vue/reactivity";
import { provide } from "@vue/runtime-core";

export default {
  name: "App",
  components: {
    Child,
  },
  setup() {
    let car = reactive({
      name: "奔驰",
      price: "40W",
    });
    provide("car", car);
    return {
      ...toRefs(car),
    };
  },
};
</script>

<style>
.app {
  background-color: gray;
  padding: 10px;
}
</style>
